Gas burner



lzaeyziorr ZZZ P. S. HARPER GAS BURNER Filed April 10. 192;

Patented Aug. 24, 1926.

1,597,409 UNITED STATES PATENT OFFICE.

PHILIP S. HARPER, OF CHICAGO, ILLINOIS.

GAS BURNER.

Application filed April 10, 1922. Serial No. 551,011.

My invention relates to sectional gas burners and particularly to atmospheric burners of the open top type used for cooking purposes with a grid or grating thereabove upon which is placed the cooking vessel to be heated. f

My' invention consists in separating the burner ports of the individual sections whereby immediate ignition of one sec- ;tion from another is prevented, and .in .so

placing the said ports that the ignited and unignited gas streams fromone section and another are brought together for ignition at some certain greater distance from the openings of the said ports.

I have discovered by experiment that in a sectionalopen top burner having burner ports in the upper side thereof that if the said ports in one section are placed sufficiently close to ports in the next section for one section to ignite from the other without a cooking vessel on the said grid, then in igniting the sections one from the other particularly with a vessel on the sa d grid a 'flashback'into the burner body W111 occur unless the burner is being operated at a very high velocity-of mixture through the burner ports, which expedient is not always possible nor desirable. This flashing back is due tothe fact that when gas'is first turned into a burner a very lean mixture is discharged from the burner. ports, such mixture burning with great rapidity and hence very readily flashing back through the burner ports into the body of the burner. It is known that if the ports are spaced sufliciently apart so as to prevent such firing back as described no interignition without'a vessel on the grid normally takes place, but I have discovered that in such case one section may successfully be ignited from another by bringing the flame or hot combustion products of the one into mixture with the combustible gases of the other at some certain distance from the openings of the said burner ports. Successin] ignition is obtained in such event due to the fact that when the combustible mixture is sufficiently rich at this certain distance to It should be noted that in the case of a closed top stove, satisfactory inter-lighting of the sections can. be by proper spacing of the orts, the impinging and spreading of tile combustion gases under the said solid mp causing intel-mixture and consequent ignition. My invention relates only to the higher etficiency open top 9r grid top burner where special PIOVISIOIL 1s necessary to'cause the convergmg and intermixing of the gases from different sections at a certain distance from the port openings such as necessary to obtain satisfactory obtained simply suitable and satisfactory for all sizes of,

cooking vessels adapted for use in connection with a burner of the said type.

These and other objects of my invention Wlll be more'apparent and better understood by reference to the drawings, in which- Flgure 1 is a plan view of a two section i urner'of the preferred form of my inven- 10D;

Figure 2 is a sectional elevation along the {me 2-2 of the burner shown in Figure -C Referring now specifically to the drawings, a burner body 10 is shown having openings 11 and 12 into one or both of which with any suitable control means a mixture of gas and air may be injected. the said openings 11 and 12 connect-ing respectively to burner sections 13 and 14, said sec tions lying in a horizontal plane and being concentrically positioned as shown. Each of the said sections 13 and 14 has a plurality of burner ports as 15, 16, 17 and 18 ex tending through the upper sides thereof, the ports 18 in the section 14 being at a conignition of one section y from another under all conditions as herein siderable distance from the nearest ports 17 in the section 13 such distance being provided for the purposes herein "specified; The outer ports 15 in section 13 are placed circumferentially of the burner body 10in place of continuing in radial lines as in the ordinary burner of this type, such improved ameter of the burner. Above the said burner sections supported in any practical ma n-j ner at a suitable distance therefrom is a I grid member 19 with radial prongs 20 which in this form of my invention are joined to a center ring 21 which is cut at points 22 in sections in order to provide for expansion and contraction on heating. The said ring 21 is so placed as to partially cover as shown the burner ports 17 in the outer section 13 so that jets of combustible mixture from the said ports are spread out on impinging against the said ring in the said grid 19, part of the said mixture being deflected toward and over the ports 18 of the inner section 14 whereby, with the said inner section burning, when fuel is turned into the outer section it will'be ignited in due course without firing back into the burner body, all in accordance with causes hereinbeforc disclosed. The stack effect of the hot products of combustion from the inner section in passing through the said ring'portion 21 also have a tendency to cause a similar flow of the combustible mixture from the outer section, such factor contributing materially in the result.

1 While I have described more or less precisely the details of construction, I do not wish to be understood as limiting myself thereto,-as I contemplate changes in form and the proportion of parts and the substitution of equivalents as circumstances may suggest or render expedient without departing from the spirit or scope of my invention. 4

I claim 1. An open top gas stove burner having two substantially horizontal sections, each of said sections having a fuel supply passage thereto, each of said sections having a plurality of burner ports in the upper side thereof, the ports in one section being spaced apart from the corresponding ports in the other section 'so that in normal combustion of gas passing therefrom the gas will not be ignited by the flame from an adjacent section, and means for impinging the gas from the said ports of one section towards the said ports of the other section.

2. A plurality of gas burner sections, each section having a fuel supply passage connected thereto, each of said sections also having a plurality of burner ports in the upper side thereof, the ports in one section being spaced from the corresponding ports in the other section a distance greater than v the minimum spacing between ports in any one section so that in normal combustion of as passing therefrom. the gas will nothe ignited by the flame from an adjacent section, and means for diverting the flow from the said ports ofone jsection' to the said ports offthe-othe r section. i an luralityjof sec'ti'on saving a fuel supply passage connected theret ach section'also having. a er portsin the upper side "gin one section being spaced from the corre po section at a dista'nce greater. than the :Ininimum spacing of ports in any one section-so that in normal combustion'of gas passing therefrom the gas will not be ignited bythe flame from an adjacent section, and deflecting means directly in line with the said ports in one section and extending towards the said ports in another section.

gas burner sections, each .nding ports in the other.

. 4. In an open top gas stove burner a burner body member having two substantially horizontal concentric sections, each of the said sections having a fuel supply passage thereto, each of the said sections having a plurality of burner ports in the upper slde thereof, the said ports in one section being spaced apart from the said ports in another section a greater distance than the minimum spacing of the said ports in the same section; a grid member supported above the said sections whereon a cooking vessel may be placed for heating, the said grid member having a ring shaped portion extending over the jets of one section and towards the jets of the other section.

5. In an open top gas stove burner a burner body member having two substantially horizontal concentric burner sections, each of the said sections having a fuel supply passage thereto, each of the said sections having a plurality of burner ports in the upper side thereof, the said ports in one section being spaced apart from the said ports in another section a greater distance than the minimum spacing of ports in the same section, and in the outer of the said sections the said'ports being positioned so that rows of ports extend both radially and circumferentially in any group of ports having substantially the minimum port spaclng; a grid member supported above the said sections whereon a cooking vessel may be placed for heating, the said grid member having a ring shaped portion extending over the jets of'one section and towards the jets of the other section.

6. In combination a burner body having a plurality of burner sections concentrically arranged with respect to each other, each burner section having rows of concentricallyarranged burner ports therein, the row of one section being spaced apart from the row of the adjacent section so that in normal combustion of gas passing therefrom the gas will not be ignited by the flame from another section, and' means'avherebythe gas- 7. A gas burner having two heating secabove the said sections whereon a cooki tions arranged within the area covered by vessel may be placed for heating, the sai the usual cooking vessel, each section having grid having a solid portion substantially exa fuel supply thereto and a plurality of tending over the space between the burner 5 burner ports in the upper side thereof, the ports of the said two burner sections.

rts of one section being spaced apart Signed at Chicago, Illinois, this 3rd day 0m those" in another section, a distance of April, 1922. a greater than the maximum port spacing in either section, a grid member supported PHILIP s. HARPER. 

